Simplify.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72970 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 4b1cda0..03c5005 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -2462,24 +2462,15 @@
ScalarEvolution::BackedgeTakenInfo
ScalarEvolution::ComputeBackedgeTakenCount(const Loop *L) {
// If the loop has a non-one exit block count, we can't analyze it.
- SmallVector<BasicBlock*, 8> ExitBlocks;
- L->getExitBlocks(ExitBlocks);
- if (ExitBlocks.size() != 1) return UnknownValue;
+ BasicBlock *ExitBlock = L->getExitBlock();
+ if (!ExitBlock)
+ return UnknownValue;
// Okay, there is one exit block. Try to find the condition that causes the
// loop to be exited.
- BasicBlock *ExitBlock = ExitBlocks[0];
-
- BasicBlock *ExitingBlock = 0;
- for (pred_iterator PI = pred_begin(ExitBlock), E = pred_end(ExitBlock);
- PI != E; ++PI)
- if (L->contains(*PI)) {
- if (ExitingBlock == 0)
- ExitingBlock = *PI;
- else
- return UnknownValue; // More than one block exiting!
- }
- assert(ExitingBlock && "No exits from loop, something is broken!");
+ BasicBlock *ExitingBlock = L->getExitingBlock();
+ if (!ExitingBlock)
+ return UnknownValue; // More than one block exiting!
// Okay, we've computed the exiting block. See what condition causes us to
// exit.